1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 // Copyright 2017 IBM Corp. 3 #ifndef _OCXL_INTERNAL_H_ 4 #define _OCXL_INTERNAL_H_ 5 6 #include <linux/pci.h> 7 #include <linux/cdev.h> 8 #include <linux/list.h> 9 #include <misc/ocxl.h> 10 11 #define MAX_IRQ_PER_LINK 2000 12 #define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK 13 14 extern struct pci_driver ocxl_pci_driver; 15 16 struct ocxl_fn { 17 struct device dev; 18 int bar_used[3]; 19 struct ocxl_fn_config config; 20 struct list_head afu_list; 21 int pasid_base; 22 int actag_base; 23 int actag_enabled; 24 int actag_supported; 25 struct list_head pasid_list; 26 struct list_head actag_list; 27 void *link; 28 }; 29 30 struct ocxl_file_info { 31 struct ocxl_afu *afu; 32 struct device dev; 33 struct cdev cdev; 34 struct bin_attribute attr_global_mmio; 35 }; 36 37 struct ocxl_afu { 38 struct kref kref; 39 struct ocxl_fn *fn; 40 struct list_head list; 41 struct ocxl_afu_config config; 42 int pasid_base; 43 int pasid_count; /* opened contexts */ 44 int pasid_max; /* maximum number of contexts */ 45 int actag_base; 46 int actag_enabled; 47 struct mutex contexts_lock; 48 struct idr contexts_idr; 49 struct mutex afu_control_lock; 50 u64 global_mmio_start; 51 u64 irq_base_offset; 52 void __iomem *global_mmio_ptr; 53 u64 pp_mmio_start; 54 void *private; 55 }; 56 57 enum ocxl_context_status { 58 CLOSED, 59 OPENED, 60 ATTACHED, 61 }; 62 63 // Contains metadata about a translation fault 64 struct ocxl_xsl_error { 65 u64 addr; // The address that triggered the fault 66 u64 dsisr; // the value of the dsisr register 67 u64 count; // The number of times this fault has been triggered 68 }; 69 70 struct ocxl_context { 71 struct ocxl_afu *afu; 72 int pasid; 73 struct mutex status_mutex; 74 enum ocxl_context_status status; 75 struct address_space *mapping; 76 struct mutex mapping_lock; 77 wait_queue_head_t events_wq; 78 struct mutex xsl_error_lock; 79 struct ocxl_xsl_error xsl_error; 80 struct mutex irq_lock; 81 struct idr irq_idr; 82 u16 tidr; // Thread ID used for P9 wait implementation 83 }; 84 85 struct ocxl_process_element { 86 __be64 config_state; 87 __be32 pasid; 88 __be16 bdf; 89 __be16 reserved1; 90 __be32 reserved2[9]; 91 __be32 lpid; 92 __be32 tid; 93 __be32 pid; 94 __be32 reserved3[10]; 95 __be64 amr; 96 __be32 reserved4[3]; 97 __be32 software_state; 98 }; 99 100 int ocxl_create_cdev(struct ocxl_afu *afu); 101 void ocxl_destroy_cdev(struct ocxl_afu *afu); 102 int ocxl_file_register_afu(struct ocxl_afu *afu); 103 void ocxl_file_unregister_afu(struct ocxl_afu *afu); 104 105 int ocxl_file_init(void); 106 void ocxl_file_exit(void); 107 108 int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size); 109 void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size); 110 int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size); 111 void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size); 112 113 /* 114 * Get the max PASID value that can be used by the function 115 */ 116 int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count); 117 118 /* 119 * Control whether the FPGA is reloaded on a link reset 120 */ 121 int ocxl_config_get_reset_reload(struct pci_dev *dev, int *val); 122 int ocxl_config_set_reset_reload(struct pci_dev *dev, int val); 123 124 /* 125 * Check if an AFU index is valid for the given function. 126 * 127 * AFU indexes can be sparse, so a driver should check all indexes up 128 * to the maximum found in the function description 129 */ 130 int ocxl_config_check_afu_index(struct pci_dev *dev, 131 struct ocxl_fn_config *fn, int afu_idx); 132 133 /** 134 * ocxl_link_update_pe() - Update values within a Process Element 135 * @link_handle: the link handle associated with the process element 136 * @pasid: the PASID for the AFU context 137 * @tid: the new thread id for the process element 138 * 139 * Returns 0 on success 140 */ 141 int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid); 142 143 int ocxl_context_mmap(struct ocxl_context *ctx, 144 struct vm_area_struct *vma); 145 void ocxl_context_detach_all(struct ocxl_afu *afu); 146 147 int ocxl_sysfs_register_afu(struct ocxl_file_info *info); 148 void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info); 149 150 int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset); 151 u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id); 152 void ocxl_afu_irq_free_all(struct ocxl_context *ctx); 153 154 #endif /* _OCXL_INTERNAL_H_ */ 155